Tamron SP AF 17-35 mm f/2.8-4 Di LD Aspherical (IF)
7. Coma and astigmatism
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The Tamron 17-35 mm corrects the coma very well. Its influence is just slightly visible at the ends of the focal lengths range and almost imperceptible in the middle. In this category the tested lens deserves our praise.
The astigmatism correction can be praised only in the 17-24 mm range though, where the average difference between vertical and horizontal MTF50 function values amounts to 3.2%, which is a very good result. At 35 mm the situation gets worse and the level of this aberration increases to 7%.
